368 SOLANACEAE (NIGHTSHADE FAMILY) 
blue, five-lobed, nearly an inch broad; the five stamens with 
equal tapering anthers, similar.to the preceding species; calyx- 
lobes narrow lance-shaped, acute, hairy. Fruit a globular, yellow 
berry, about a half-inch in diameter. (Fig. 256.) 
Means of control the same as for the preceding species. 
BUFFALO BUR 
Solanum rosiradtum, Dunal. 
Other English names: Beaked Nightshade, Sand Bur, Colorado Bur, 
Texas Thistle, Mexican Thistle. 
Native. Annual. Propagates by seeds. 
Time of bloom: ‘May to September. 
Seed-time: July to November. . 
Range: South Dakota to Tennessee, Mississippi, Texas, and Mexico. 
Locally in the Eastern States. 
Habitat: Plains and prairies, foothills; meadows, pastures, culti- 
vated ground, waste places. 
This is one of the weeds frequently transported in baled hay, 
and its appearance in eastern localities has usually been first in 
vacant lots near city livery stables and 
on near-by farms where such stable 
refuse has been purchased for manur- 
ing the land. Also the burs are dis- 
tributed in the wool of sheep, as they 
formerly were in the matted coats of 
,the buffalo herds, the plants being 
always abundant about the “buffalo 
wallows.” (Fig. 257.) 
Stem one to two feet high, much 
branched, covered with yellowish, star- 
shaped hairs, and densely set with 
slender, awl-like, yellowspines. Leaves 
long oval in outline but once or twice 
pinnatifid, the segments often’ not op- 
posite and very irregular in size, but 
the terminal one being usually largest, 
Fic. 257.— Buffalo Bur (Sola- covered with rayed hairs, the midribs 
num rostratum). xX }. and the petioles prickly. Flowers in 
